clover/functional: add id_equals helper

v2: pass argument by value

Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Reviewed-by: Pierre Moreau <pierre.morrow@free.fr>

src/gallium/state_trackers/clover/util/functional.hpp

@@ -347,6 +347,21 @@ namespace clover {
       const std::string &name;
    };
 
+   class id_equals {
+   public:
+      id_equals(const uint32_t id) : id(id) {
+      }
+
+      template<typename T>
+      bool
+      operator()(const T &x) const {
+         return x.id == id;
+      }
+
+   private:
+      const uint32_t id;
+   };
+
    template<typename T>
    class key_equals_t {
    public: